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Josie Schaefer
Mathematics
1 August, 19:22
Simplify.
6x2x-8
9y2
+2
Answers (
1
)
Konner Stevens
1 August, 19:29
0
6x3 - 89y2
Step by step solution:
Step 1:
Equation at the end of step 1:
((6 • (x2)) • x) - 89y2
Step 2:
Equation at the end of step 2:
((2•3x2) • x) - 89y2
Step 3:
Trying to factor as a Difference of Cubes:
3.1 Factoring: 6x3-89y2
Theory : A difference of two perfect cubes, a3 - b3 can be factored into
(a-b) • (a2 + ab + b2)
Proof : (a-b) • (a2+ab+b2) =
a3+a2b+ab2-ba2-b2a-b3 =
a3 + (a2b-ba2) + (ab2-b2a) - b3 =
a3+0+0+b3 =
a3+b3
Check : 6 is not a cube!
Ruling : Binomial can not be factored as the difference of two perfect cubes
Final result:
6x3 - 89y2
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